Both cast ceramic and metal post and cores were made for endodontically treated extracted teeth and restored with ceramic restorations. The ceramic posts did not change the translucency or color of the natural tooth, in contrast to the metal posts, which altered both. A clinical study followed, with eight restorations placed for a mean period of service of 11.3 months. One ceramic post failed early following cementation. This preliminary report indicates that ceramic posts and cores offer excellent esthetic results and may be strong enough for clinical use under normal conditions.
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Micromachines (Basel)
December 2024
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.
The safety of power batteries in the automotive industry is of paramount importance and cannot be emphasized enough. As lithium-ion battery technology continues to evolve, the energy density of these batteries increases, thereby amplifying the potential risks linked to battery failures. This study explores pivotal safety challenges within the electric vehicle sector, with a particular focus on thermal runaway and gas emissions originating from lithium-ion batteries.
View Article and Find Full Text PDFACS Nano
January 2025
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
The seamless integration of electrocatalysts onto the electrode is crucial for enhancing water electrolyzers, yet it is especially challenging when scaled up to large manufacturing. Despite thorough investigation, there are few reports that tackle this integration through roll-to-roll (R2R) methodology, a technique crucial for fulfilling industrial-scale demands. Here, we develop an R2R flash Joule heating (R2R-FJH) system to process catalytic electrodes with superior performance.
View Article and Find Full Text PDFJ Prosthodont
January 2025
Department of Restorative Dental Science, College of Dentistry, University of Ha'il, Ha'il, Saudi Arabia.
Purpose: To investigate how varying ferrule heights and the number of glass fiber posts affect fracture resistance and behavior of endodontically treated maxillary first premolars with substantial loss of tooth structure.
Materials And Methods: Twenty-four extracted endodontically treated human maxillary first premolars were divided into three groups (n = 8) based on ferrule height and post number. The groups were as follows: premolars of 2 mm ferrule height that were restored with single posts (control group), premolars of 0.
Sensors (Basel)
December 2024
School of Instrument and Electronics, North University of China, Taiyuan 030051, China.
Tire pressure monitoring systems (TPMSs) are essential for maintaining driving safety by continuously monitoring critical tire parameters, such as pressure and temperature, in real time during vehicle operation. Among these parameters, tire pressure is the most significant, necessitating the use of highly precise, cost-effective, and energy-efficient sensing technologies. With the rapid advancements in micro-electro-mechanical system (MEMS) technology, modern automotive sensing and monitoring systems increasingly rely on MEMS sensors due to their compact size, low cost, and low power consumption.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
NbO-type ceramics (where = Mg, Ca, Mn, Co, Ni, Zn and = Ti, Zr) are essential for satellite communication and mobile base stations due to their medium relative permittivity () and high quality factor ( × ). Although ZnTiZrNbO ceramic exhibits impressive microwave dielectric properties, including an of 29.75, a × of 107,303 GHz, and a of -24.
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